#define NANOPB_INTERNALS
#include "pb.h"
#include "pb_encode.h"
-#include <string.h>
/* The warn_unused_result attribute appeared first in gcc-3.4.0 */
#if !defined(__GNUC__) || ( __GNUC__ < 3) || (__GNUC__ == 3 && __GNUC_MINOR__ < 4)
&pb_enc_bytes,
&pb_enc_string,
- &pb_enc_submessage
+ &pb_enc_submessage,
+ NULL /* extensions */
};
/* pb_ostream_t implementation */
stream.state = buf;
stream.max_size = bufsize;
stream.bytes_written = 0;
+#ifndef PB_NO_ERRMSG
+ stream.errmsg = NULL;
+#endif
return stream;
}
if (stream->callback != NULL)
{
if (stream->bytes_written + count > stream->max_size)
- return false;
+ PB_RETURN_ERROR(stream, "stream full");
#ifdef PB_BUFFER_ONLY
if (!buf_write(stream, buf, count))
- return false;
+ PB_RETURN_ERROR(stream, "io error");
#else
if (!stream->callback(stream, buf, count))
- return false;
+ PB_RETURN_ERROR(stream, "io error");
#endif
}
/* Main encoding stuff */
-/* Callbacks don't need this function because they usually know the data type
- * without examining the field structure.
- * Therefore it is static for now.
- */
+/* Encode a static array. Handles the size calculations and possible packing. */
static bool checkreturn encode_array(pb_ostream_t *stream, const pb_field_t *field,
const void *pData, size_t count, pb_encoder_t func)
{
if (count == 0)
return true;
+ /* We always pack arrays if the datatype allows it. */
if (PB_LTYPE(field->type) <= PB_LTYPE_LAST_PACKABLE)
{
if (!pb_encode_tag(stream, PB_WT_STRING, field->tag))
size = 8 * count;
}
else
- {
- pb_ostream_t sizestream = {0,0,0,0};
+ {
+ pb_ostream_t sizestream = PB_OSTREAM_SIZING;
p = pData;
for (i = 0; i < count; i++)
{
return true;
}
+/* Encode a field with static allocation, i.e. one whose data is stored
+ * in the structure itself. */
+static bool checkreturn encode_static_field(pb_ostream_t *stream,
+ const pb_field_t *field, const void *pData)
+{
+ pb_encoder_t func;
+ const void *pSize;
+ bool dummy = true;
+
+ func = PB_ENCODERS[PB_LTYPE(field->type)];
+
+ if (field->size_offset)
+ pSize = (const char*)pData + field->size_offset;
+ else
+ pSize = &dummy;
+
+ switch (PB_HTYPE(field->type))
+ {
+ case PB_HTYPE_REQUIRED:
+ if (!pb_encode_tag_for_field(stream, field))
+ return false;
+ if (!func(stream, field, pData))
+ return false;
+ break;
+
+ case PB_HTYPE_OPTIONAL:
+ if (*(const bool*)pSize)
+ {
+ if (!pb_encode_tag_for_field(stream, field))
+ return false;
+
+ if (!func(stream, field, pData))
+ return false;
+ }
+ break;
+
+ case PB_HTYPE_REPEATED:
+ if (!encode_array(stream, field, pData, *(const size_t*)pSize, func))
+ return false;
+ break;
+
+ default:
+ PB_RETURN_ERROR(stream, "invalid field type");
+ }
+
+ return true;
+}
+
+/* Encode a field with callback semantics. This means that a user function is
+ * called to provide and encode the actual data. */
+static bool checkreturn encode_callback_field(pb_ostream_t *stream,
+ const pb_field_t *field, const void *pData)
+{
+ const pb_callback_t *callback = (const pb_callback_t*)pData;
+
+#ifdef PB_OLD_CALLBACK_STYLE
+ const void *arg = callback->arg;
+#else
+ void * const *arg = &(callback->arg);
+#endif
+
+ if (callback->funcs.encode != NULL)
+ {
+ if (!callback->funcs.encode(stream, field, arg))
+ PB_RETURN_ERROR(stream, "callback error");
+ }
+ return true;
+}
+
+/* Encode a single field of any callback or static type. */
+static bool checkreturn encode_field(pb_ostream_t *stream,
+ const pb_field_t *field, const void *pData)
+{
+ switch (PB_ATYPE(field->type))
+ {
+ case PB_ATYPE_STATIC:
+ return encode_static_field(stream, field, pData);
+
+ case PB_ATYPE_CALLBACK:
+ return encode_callback_field(stream, field, pData);
+
+ default:
+ PB_RETURN_ERROR(stream, "invalid field type");
+ }
+}
+
+/* Default handler for extension fields. Expects to have a pb_field_t
+ * pointer in the extension->type->arg field. */
+static bool checkreturn default_extension_handler(pb_ostream_t *stream,
+ const pb_extension_t *extension)
+{
+ const pb_field_t *field = (const pb_field_t*)extension->type->arg;
+ return encode_field(stream, field, extension->dest);
+}
+
+/* Walk through all the registered extensions and give them a chance
+ * to encode themselves. */
+static bool checkreturn encode_extension_field(pb_ostream_t *stream,
+ const pb_field_t *field, const void *pData)
+{
+ const pb_extension_t *extension = *(const pb_extension_t* const *)pData;
+ UNUSED(field);
+
+ while (extension)
+ {
+ bool status;
+ if (extension->type->encode)
+ status = extension->type->encode(stream, extension);
+ else
+ status = default_extension_handler(stream, extension);
+
+ if (!status)
+ return false;
+
+ extension = extension->next;
+ }
+
+ return true;
+}
+
bool checkreturn pb_encode(pb_ostream_t *stream, const pb_field_t fields[], const void *src_struct)
{
const pb_field_t *field = fields;
const void *pData = src_struct;
- const void *pSize;
size_t prev_size = 0;
while (field->tag != 0)
{
- pb_encoder_t func = PB_ENCODERS[PB_LTYPE(field->type)];
pData = (const char*)pData + prev_size + field->data_offset;
- pSize = (const char*)pData + field->size_offset;
-
prev_size = field->data_size;
- if (PB_HTYPE(field->type) == PB_HTYPE_REPEATED)
+
+ /* Special case for static arrays */
+ if (PB_ATYPE(field->type) == PB_ATYPE_STATIC &&
+ PB_HTYPE(field->type) == PB_HTYPE_REPEATED)
+ {
prev_size *= field->array_size;
-
- switch (PB_HTYPE(field->type))
+ }
+
+ if (PB_LTYPE(field->type) == PB_LTYPE_EXTENSION)
{
- case PB_HTYPE_REQUIRED:
- if (!pb_encode_tag_for_field(stream, field))
- return false;
- if (!func(stream, field, pData))
- return false;
- break;
-
- case PB_HTYPE_OPTIONAL:
- if (*(const bool*)pSize)
- {
- if (!pb_encode_tag_for_field(stream, field))
- return false;
-
- if (!func(stream, field, pData))
- return false;
- }
- break;
-
- case PB_HTYPE_REPEATED:
- if (!encode_array(stream, field, pData, *(const size_t*)pSize, func))
- return false;
- break;
-
- case PB_HTYPE_CALLBACK:
- {
- const pb_callback_t *callback = (const pb_callback_t*)pData;
- if (callback->funcs.encode != NULL)
- {
- if (!callback->funcs.encode(stream, field, callback->arg))
- return false;
- }
- break;
- }
+ /* Special case for the extension field placeholder */
+ if (!encode_extension_field(stream, field, pData))
+ return false;
+ }
+ else
+ {
+ /* Regular field */
+ if (!encode_field(stream, field, pData))
+ return false;
}
field++;
return true;
}
+bool pb_encode_delimited(pb_ostream_t *stream, const pb_field_t fields[], const void *src_struct)
+{
+ return pb_encode_submessage(stream, fields, src_struct);
+}
+
/* Helper functions */
bool checkreturn pb_encode_varint(pb_ostream_t *stream, uint64_t value)
{
break;
default:
- return false;
+ PB_RETURN_ERROR(stream, "invalid field type");
}
return pb_encode_tag(stream, wiretype, field->tag);
bool checkreturn pb_encode_submessage(pb_ostream_t *stream, const pb_field_t fields[], const void *src_struct)
{
/* First calculate the message size using a non-writing substream. */
- pb_ostream_t substream = {0,0,0,0};
+ pb_ostream_t substream = PB_OSTREAM_SIZING;
size_t size;
bool status;
return pb_write(stream, NULL, size); /* Just sizing */
if (stream->bytes_written + size > stream->max_size)
- return false;
+ PB_RETURN_ERROR(stream, "stream full");
/* Use a substream to verify that a callback doesn't write more than
* what it did the first time. */
substream.state = stream->state;
substream.max_size = size;
substream.bytes_written = 0;
+#ifndef PB_NO_ERRMSG
+ substream.errmsg = NULL;
+#endif
status = pb_encode(&substream, fields, src_struct);
stream->bytes_written += substream.bytes_written;
stream->state = substream.state;
+#ifndef PB_NO_ERRMSG
+ stream->errmsg = substream.errmsg;
+#endif
if (substream.bytes_written != size)
- return false;
+ PB_RETURN_ERROR(stream, "submsg size changed");
return status;
}
case 2: value = *(const uint16_t*)src; break;
case 4: value = *(const uint32_t*)src; break;
case 8: value = *(const uint64_t*)src; break;
- default: return false;
+ default: PB_RETURN_ERROR(stream, "invalid data_size");
}
return pb_encode_varint(stream, value);
{
case 4: value = *(const int32_t*)src; break;
case 8: value = *(const int64_t*)src; break;
- default: return false;
+ default: PB_RETURN_ERROR(stream, "invalid data_size");
}
return pb_encode_svarint(stream, value);
bool checkreturn pb_enc_string(pb_ostream_t *stream, const pb_field_t *field, const void *src)
{
- UNUSED(field);
- return pb_encode_string(stream, (const uint8_t*)src, strlen((const char*)src));
+ /* strnlen() is not always available, so just use a for-loop */
+ size_t size = 0;
+ const char *p = (const char*)src;
+ while (size < field->data_size && *p != '\0')
+ {
+ size++;
+ p++;
+ }
+
+ return pb_encode_string(stream, (const uint8_t*)src, size);
}
bool checkreturn pb_enc_submessage(pb_ostream_t *stream, const pb_field_t *field, const void *src)
{
if (field->ptr == NULL)
- return false;
+ PB_RETURN_ERROR(stream, "invalid field descriptor");
return pb_encode_submessage(stream, (const pb_field_t*)field->ptr, src);
}
Code Review / apps / agl-service-can-low-level.git / blobdiff